Ok, thats easy to explain, and there are settings in production mgr. I assuming youre saying that somtimes you can hit cu t and It justs gos and other times you have to go into PM and hit send job.
When you hit print, PM either starts up, like a second program opening, or it has already been open and running in the background. Otberwise the job wouldnt cut.
Look in > settings in PM in default job options I think it is, and you can select 'hold' or 'send now and delete' . I think you can also set this from your design screen. Go up to > Edit> peferences> rip and print dialog is in there too if I remember correctly.